
public class Circular {
	double radius;

	public void area() {
		double area = radius * radius * 3.14;
		System.out.println("圆的面积为：" + area);
	}

	public void perimeter() {
		double perimeter = radius * 3.14 * 2;
		System.out.println("圆的周长为：" + perimeter);
	}
}
